Dry battery-cell.



Patented July 23, 1912'.

J. W. BROWN.

DRY BATTERY CELL.

I APPLICATION FILED SEPT. 14,-1906. 1 ',033,228.

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m u am m l l vUNITED ;srA'rEsl"rarnilir OFFICE JonN w. BROWN,orient/mmm; omo, AssiGNoR rro Nembrini; CARBON c oMP'ANY, oF/CL VELAND,omo, A coRPoBATIoN or. NEW JERSEY. l

- 'nur BATTERYcELi..

Application led September 14, 1908. VSerial No. 334,603'.

' 'A To all ze om it may concern.'

:Be itknown that I, JOHN lV. BROWN, a4 citizen of the' United States,residing at Cleveland, in the county of Cuyahogavand 5 State of Ohio,have invented a certain new and useful Improvement in Dry Battery- CellSof which the following is a full, clear,

andexactdescription;

The' objects ofthe invention are to decrease the internal resistance ofa dry b uttery cell,'and therefore to increase the current; andto moreevenly distribute the current and therefore to cause .thesubstantiallyuniform consumption of the zinc can, and a .i 15corresponding prolongation of, the useful life of the cell.V l

The invention consists in the/employment in a dry cellfwvbich isotherwise like the dry cells in coinmon use, of a negative electrodemade of carbon, 'graphite or any suitable mixture of thetwo, and havinga core made of material halving high electrical conductivity Vpreferably'metal in the form of a centrally-placed rod. l ie drawing Figure lis acent-ral, sectionalelevation; and Fig. 2 is a sectional plan' view 'of adry c ell embodying the inventionf f 4 :#.Rferring-'to the parts shown,A repre- 80 sents the cylindrical zinc can; B the bibulous liningthereof; C the pulverized mixture common] used as-the filling of drybatf teries'; and the seal. The parts above .named 'are or may he of theusual construction'a'nd urrangement. l

E representsthe negative electrode which is to belmade ofA carbon orgraphite (which is anfallotropic form of carbon), or any suit-ablevmixture of carbon and raphitc:

40 and is to have 'a core e which is ma e of material having highelectrical conductivity, preferably of metal in the form of' a rod whichextendsfrom the top of the electrode down through it centrally to apoint near its lowerend. r

When the core is made of metal the car- Speciacation ot Letters atent. lPatented July 23, 191.2.

.bon electrodeshould be soaked paraiin or its equivalent for eight orten -minutes more or less, so as to partly impregnate it with l theparaiiin, whereby the corrosion of the 5 0 l. core is prevented. Y

The distance between the'ielcctrodc E and the-zinc can being the Sameatfali p0ints," and the resistance of the core c bing very slight, theinternal resistance of th'c' gelljvill 55` be decreased; the currentwill cmigetluentlya be increased, and it A'ivill be uniforl' y dis"Vtributed in the cell., The corrosion Qfthe .zinc therefore will'besubstantially unifrm, and'the life of the cell will be increased?" GQ lHaving described my invention Iclaim I. l; A dry cell comprising acylindrical Zinc l icup, a bibulous lining, a battery 'ti,lli,1l1g,'va'flj centrally placed cylindrical negative electrode, and an axiallydisposedcore embedded within that portion of' the"ele`ctrde which iswithin the cup and madeof'ma teria] havinga higher electricalconductivity than the outer part of the electrod. f'

2. A dry cell, comprising`a4 cylindrical 76,.

zinc cup, a bibulous lining, a batteryiillig, j

and a centrally placedcylindrical electrode made of a suitable carbonmixture and lilavmg a' centrally placed, metallic core-fthe electrodebeing partly impregnated with 75r paratiin.

A dry cell comprisin a cylindrical zinc cup, a bibulous lining, aiziattery filling, and a centrally placed electrode made of a suit-1able carbon mixture and having a centrally 80 placed metallic core,which core extends l from the top downward to a' point the distance ofwhich from the lower en d of the electrode is substantially equal to thedistanceimeasured laterally from said core to $5 the surface of saidelectrode. A

In testimony whereof, I hurt-unto aix my signature iii the presence oftwo witnesses.

` 'JGHN vW. BROWN. YVitnesses: 5"

1). L. ORDWAY, H. K.-Ricuanosox.l

